Carbureter.



'WTTE srarns radiative onnrpia- WILLIAM SHAKESPEARE, JR, AND WILLIAM SCHMID, F KALAIVIAZOO, MICHIGAN, ASSIGNORS TO SHAKESPEARE COMPANY, OF KALA-MAZOO, MICHIGAN.

CARBURETER.

Specification of Letters Patent.

Patented @ct. 241, 1916.

Application filed October 2, 1915. Serial No. 53,746.

To all whom it may concern:

Be it known that we, WILLIAM SHAKE- SPEARE, Jr., and WILLIAM Serrano, citizens of the United States, residing at Kalamazoo, county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements in Carburetors, of which the following is a specification.

This invention relates carbureters.

Our present improvements relate to carbureters of the general type illustrated in our application for Letters Patent filed De cember 11, 1914, Ser. No. 876,826, and is an embodiment of and, in some respects, an improvement upon the structure there illus trated.

The main objects of our invention are: First, to provide an improved carbureter which is well adapted for use on two cycle engines and on engines of small horse power, such as those usually employed on outboard motors for row boats and the like, and other single cylinder engines. Second, to provide an improved carbureter adapted for direct attachment to a two cycle engine cylinder without the interposition of inlet valves and one in which back firing into the mixing chamber of the carbureter is effectively prevented. Third, to provide an improved throttle controlled carbureter having these advantages, in which the relative proportions of fuel and air are automatically mainto improvements in tained throughout the scope of the throttle adjustment. Fourth, to provide an improved carbureter having these advantages,

which is comparatively simple in its partsand one in which the parts are easily assembled and disassembled.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

We accomplish the objects of our invention by the devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims.

.A. structure which is a preferred embodiment of our invention is clearly illustrated in the accompanving drawing, forming a part of this specification, in which:

Figure I is a side view of an engine of the type used on outboard motors with our improved carbureter mounted thereon. Fig. H is a detail vertical section through our improved carbureter on a line corresponding to line 2-2 of Fig. I. Fig. III is a detail vertical section through our improved carbureter on a line corresponding to line 3-3 of Fig. II.

In the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, the body of our improved carbureter consists of an intermediate body member 1 cylindrical in form and having a mixing chamber 2 therein. At the upper end of the body member 1 is an annular check valve seat 3.

The top body member 4 has a delivery passage 5 therein controlled by the throttle valve 6. This throttle valve is mounted on a stem 7. The lower end of the stem is supported in a bearing? formed in a boss on one side of the body member, while its other end projects at the side to receive the actuating lever 9.

The lever 9 has a segmental slot 10 therein coacting with the stop pin 11 to limit the movement of the lever. The intermediate body member 1 is shouldered at 12 to receive g coacting shoulder 13 on the body mem- The bottom body member 14 is provided with an air inlet chamber 15 and with an annular valve seat 16 at its upper end. The body member 14 has an annular shoulder 17 coacting with an annular shoulder 18 at the lower end of the intermediate body member. The body members are secured together by suitable screws or bolts, not illustrated.

The body member 14 is provided with a fuel reservoir 19. The reservoir 19 has a removable top 20 having an inlet passage 21 therein to which the fuel pipe 22 is connected. This passage 21 is controlled by the valve 23 on the float 24.

A tubular nozzle member 25 projects upwardly into the air supply chamber 15. The fuel nozzle 27 is threaded foradjustment in the nozzle member 25. This nozzle has openings 28 communicating with the fuel feed passage 26 of the reservoir.- The nozzle is arranged to deliver to the carbureting chamber 29 provided in the suction actuated member 30. This suction actuated member coacts with the valve seat 16 and constitutes an air inlet valve for the mixing chamber 2.

Oil

The carbureting chamber 29 is provided with discharge passages 31 delivering to the mixing chamber above the mixing chamber inlet valve.

The tapered fuel valve 32 is carried by the suction actuated member to be actuated therewith and coact with the fuel nozzle regulating the delivery of fuel therefrom.

The suction actuated member is provided with a conical annular valve 33 coacting with theupper end of the nozzle member. This valve controls the delivery of air to the carbureting chamber. The suction actuated member is provided with a depending sleeve portion 3a which slidably embraces the nozzle member, constituting a guide for the air actuated member. This sleeve portion is pro ided with air inlets 35.

On the upper .end of the suction actuated member is a dash-pot plunger member 36. The dash-pot cylinder member 37 is .formed in an arm 3.8 projecting from the wall of the body member 1. The check valve 39 is arranged to seat on the check valve seat 3. The check valve is in the form of a disk and is provided with a central upwardly projecting stem 40 engaging the guide socket 41 formed on the wall of the body member 4 opposite the valve. This check valve automatically opens and closes and prevents back firing into the carbureting chamber or mixing chamber.

The structure is comparatively simple and may be made very compact and is found to be especially desirable, as stated, in two cycle engines and one cylinder engine where it is desirable to make a direct connection to the engine, an engine 44: being shown in conventional form in Fig. I. The engine there illustrated is such as is commonly employed on an outboard motor.

To facilitate starting I provide a rod 42 by means of which the float may be held in a depressed position to allow the fuel to rise in the nozzle and flood the carbureter. This rod e2 is arranged through the cover 20 of the fuel reservoir and is held yieldingly in its inoperative position by the spring 43.

The suction actuated member is effectively guided by means of the dash-pot and its engagement with the fixed nozzle member. At the same time it is sensitive in its movement and chattering is prevented by the dashpot.

WVe have illustrated and described our improved carbureter in detail in the formr in which we have embodied the same for the market. e have not attempted to illustrate or describe various modifications which we contemplate as we believe the disclosure made will enable those skilled in the art to which our invention relates to embody or adapt the same as conditions may render desirable.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is:

1. In a carbureter, the combination of an intermediate body member provided with a mixing chamber and having an annular check valve seat at its upper end, a top body member having a delivery passage therein, a

bottom body member having a mixingchamber valve seat at its upper end and an air inlet chamber below said valve seat and provided with a reservoir, a disk-like check valve coacting with said check valve seat and having an upwardly projecting centrally disposed stem, said top body member being provided with a socket-like guide for said stem, a throttle valve disposed in said delivery passage at therear of said check valve, a suction actuated member constituting a mixing chamber valve coacting with said mixing chamber valve seat and having a carbureting chamber therein delivering to said mixing chamber, a tubular fixed nozzle member proiecting upwardly within said air inlet chamber, a fuel nozzle mounted in said nozzle member for adjustment therein and delivering to said carbureting chamber, said bottom member being provided with a fuel feed passage connecting said reservoir with said nozzle, a needle fuel valve carried by said suction actuated member and coacting with said nozzle, and an annular carbureting chamber valve carried by said air actuated member and having a conical portion coacting with the upper end of said nozzle member and a sleeve portion slidably embracing said nozzle member and provided with air inlets.

2. In a carbureter, the combination of an intermediate body member provided with a mixing chamber and having an annular check valve seat at its upper end, a top body member having a delivery passage therein, a bottom body member having a mixing chamber valve seat at its upper end and an air inlet chamber below said valve seat, a disk-like check valve coacting with said check valve seat and having an upwardly projecting centrally disposed stem, said top body member being provided with a socketlike guide for said stem, a throttle valve disposed in said delivery passage at the rear of said check valve, a suction actuated member constituting a mixing chamber valve coacting with said mixing chamber valve seat and having a carbureting chamber therein delivering to said mixing chamber, a fuel. nozzle delivering to said carbureting chamber, a needle fuel valve carried by said suction actuated member and coacting with said nozzle, and a carbureting chamber valve carried by said suction actuated member.

3. In a carbureter, the combination of an intermediate body member provided with a mixing chamber and having an annular check valve seat at its upper end, a top body member neoaaaa lflt havin'ga delivery passage therein, a bottom body member having a mixing chamber valve seat at its upper end and an air inlet chamber below said valve seat, a check valve coacting with said check valve seat, a throttle valve disposed ins'aid delivery passage at the rear of said check valve, anair actuated member constituting a mixing chamber valve coacting with said mixing chamber valve seat and having a carbureting chamber therein delivering to said'n'iixingchamber, a tubular fixed nozzle member projecting upwardly within said air inlet chamber, a fuel nozzle mounted in said nozzle member for adjustment therein and delivering to said carbureting chamber, a needle fuel valve carded by said air actuated member and coacting with said nozzle, an annular carbureting chamber valve carried by said air actuated member and coacting with the upper end of said nozzle member and a sleeve portion slidably embracing said nozzle member and provided with air inlets, a plunger on the inner side of said air actuated member, and a dash-pot forsaid plunger disposed in said mixing chamber, said air actuated member being guided by said dash-pot and nozzle member.

4. In a carbureter, the combination of an intermediate body member provided with a mixing chamber and having an annular check valve seat at its upper end, a top body member having a delivery passage therein, a bottom body member having a mlxmg chamber valve seat at its upper end and an air inlet chamber below said valve seat, a check valve coacting with said check valve seat, a throttle valve disposed in said delivery passage at the rear of said check valve, a suction actuated member constltuting a mixing chamber valve coacting with said mixing chamber valve seat and having a carbureting chamber therein delivering to said mixing chamber, a tubular fixed nozzle member projecting upwardly within said air inlet chamber, a fuel nozzle mounted in said nozzle member for adjustment therein and delivering to said carbureting chamber, a needle fuel valve carried by said air actuated member and coacting with said nozzle, and an annular carbureting chamber valve carried by said air actuated member and coacting with the upper end of said nozzle member and a sleeve portion slidably embracing said nozzle member and provided with air inlets.

5. In a carbureter, the combination of an intermediate body member provided with a mixing chamber and having a check valve seat at its upper end, a top body member having a delivery passage therein, a bottom body member having a mixing chamber valve seat at its'upper end and an air inlet chamber below sa d valve seat, a check valve coacting with said check valve seat, a

throttle valve disposed in said delivery 1 passage at the rearof said check valve, a suction actuated mixing chamber valve coacting with said mixing chamber valve seat, a carbureting chamber delivering to said mixing and carburetmg chamber and fuel check valve seat at its upper end, a top body member having a delivery passage therein, a bottom body member having a mixing chamber valve seat at its upper end and an air inlet chamber below said valve seat, a disk-like check valve coacting with said check valve seat and having an upwardly projecting centrally disposed stem, said top body membeuv being provided with a socketlike guide for said stem, a throttle valve disposed in said delivery passage at the'rear of said check valve, and a suction actuated mixing chamber valve coacting with said mixing chamber valve seat.

7. In a carburetor, the combination of a mixing chamber and a delivery passage, 21 check valve arranged between said mixing chamber and delivery passage, a throttle valve for said delivery passage, a suction actuated member constituting a mixing chamber valve andhaving a carbureting chamber therein delivering to said mixing chamber, a fuel nozzle delivering to said carbureting chamber, a carbureting chamber valve carried by said air actuated member, a needle fuel valve carried by said suction actuated member, and coacting with said nozzle, and a dash-pot for said air actuated member disposed within said mixing chamber.

8. In a carbureter, the combination of a mixing chamber, a carbureting chamber delivering to said mixing chamber, a throttle valve disposed at the rear of said mixing chamber, a suction actuated inlet valve for said mixing chamber, a check valve disposed between said throttle valve and said suction actuated inlet valve, and carbureting chamber and fuel valves carried by said suction actuated valve.

9. In a carbureter, the combination of a mixing chamber, a suction actuated mixing chamber valve, a carbureting chamber delivering to said mixing chamber at the rear of said mixing chamber valve, chamber inlet valve ing chamber valve, to said carbureting a carbureting actuated with said mixa fuel valve delivering chamber and actuated with said mixing chamber valve, a throttle 1 valve, and a check valve disposed between said throttle valve and said mixing chamber valve.

10. I11 a carbureter, the combination of a mixing chamber, a suction actuated air inlet valve for said mixing chamber, a throttle valve at the rear of said mixing chamber, a check valve disposed between said throttle valve and mixing chamber air inlet valve, a fuel valve actuated with said mixing chamber air inlet valve, and a dash-pot for said suction actuated air inlet valve disposed in said mixing chamber in front of said check valve. 1

. In Witness whereof, We have hereunto set our hands and seals 1n the presence of two Witnesses.

WILLIAM SHAKESPEARE, JR. WILLIAM SCHMII).

Witnesses: v

LUELLA G. GREENFIELD, MARGARET L. GLASGOW.

copies of this iatent may lie-obtained for five cents each, by addressing the Commissioner of latentsx Washington, D. C. 

